[z3n]

“What’s important is that once a person’s immune system knows how to make antibodies for a specific protein...”

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So, one mutation could create a strain that the mRNA vaccine does not prepare you for?!??

The prevalent the vaccine becomes in the population, the more likely that single mutation strain takes hold.

[RummyChick]

There is information out that the South African strain mutated to evade something the mrna vaccines try to do.
Dont remember the particulars. Something about Escape Mutant.

And while they believe the current mutation still might be dealt with in the current vaccine...later mutations might cause a problem

It seems this is a pretty crafty virus. (and yes, I still believe it is man made)

[lepton]

So, one mutation could create a strain that the mRNA vaccine does not prepare you for?!??

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It always works that way. Just has to be the right protein, with the right mutation. Most of those mutations are not viable.